Three Types of Stigmatic Image Formations by a Quadrupole Triplet

概要

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A symmetrical quadrupole triplet lens system is studied theoretically from a practical point of view. Three types of stigmatic image formations, i.e., an ordinary stigmatic image formation, a stigmatic demagnified image formation and a stigmatic magnified image formation can be obtained by an electrical asymmetric operation, by which is meant that lenses of different lens potentials are used for the inlet and outlet quadrupole sections. The lens system consists of three equal quadrupoles, separations between each quadrupole being equal to the axial length of them. The focusing characteristics for each type of image formation are analyzed numerically and are given in the graphs convenient to use. An axial field distribution required for the calculation is based on the well-known bell-shaped model.
Elsevier Scienceの論文
1975-04-00